On Tue, Nov 22, 2011 at 7:50 AM, Hena Dutta <hdutta10 at gmail.com> wrote: > Could you please tell me how I can measure angle between two helices. Can > COOT or PYMOL measure this? This was the first hit on Google: http://www.pymolwiki.org/index.php/AngleBetweenHelices -Nat